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HomeMy WebLinkAboutSW8160910_HISTORICAL FILE_20191121PERMIT NO. DOC TYPE DOC DATE STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS SWs_J ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION tM* aoti oral YYYYMMDD ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Director November 21, 2019 NORTH CAROLINA Environmental Quality WCM Enterprises, LLC Attn: William W" Schoettelkotte, Manager 305 Colonial Dr. Wilmington, NC 28403 Subject: State Stormwater Management Permit No. SW8 160910 Enterprise Drive Self Storage High Density Wet Detention Pond Project Brunswick County Dear Mr. Schoettelkotte: The Wilmington Regional Office received a complete, modified Stormwater Management Permit Application for the Enterprise Drive Self Storage on November 14, 2019. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000 (1995 Rules) as amended by Session Law (SL) 2008-211 and subsequently amended on January 1, 2017 (2017 Rules). We are forwarding modified Permit No. SW8 160910 dated November 21, 2019, for the construction, operation and maintenance of the BMP's and built -upon areas associated with the subject project. This permit shall be effective from the date of issuance until October 21, 2024 and the project shall be subject to the conditions and limitations as specified therein and does not supersede any other agency permit that may be required. Failure to comply with these requirements will result in future compliance problems. Please note that this permit is not transferable except after notice to and approval by the Division. Please refer to Attachment C for a detailed description of the current proposed major modification" This cover letter, attachments, and all documents on file with DEMLR shall be considered part of this permit and is herein incorporated by reference. Please replace the previously approved plan sheets with the attached modified and approved versions. Please replace the previous application (SWU-101), supplements, and operation and maintenance agreement with the attached modified versions. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The written petition must conform to Chapter 1SOB of the North Carolina General Statutes, and must be filed with the OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact Christine Hall in the Wilmington Regional Office, at (910) 796-7215. Sincerely, -;,,S. Daniel Smith, Director Division of Energy, Mineral and Land Resources GDS/ canh: 111StormwaterlPermits & Project00161160910 HD12019 It permit 160910 cc: Branch Smith, Paramounte Engineering Brunswick County Building Inspections Brunswick County Engineering Wilmington Regional Office Stormwater File Q 633 North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources MQ1 Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405 NOFiIH CFHOIdNh State Stormwater Management Systems Permit No. SW8 160910 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF ENERGY, MINERAL AND LAND RESOURCES STATE STORMWATER MANAGEMENT PERMIT HIGH DENSITY DEVELOPMENT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carofina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO WCM Enterprises, LLC Enterprise Drive Self Storage Enterprise Drive and Trade Street, Leland, Brunswick County FOR THE construction, operation and maintenance of two (2) wet detention ponds in compliance with the provisions of 15A NCAC 2H .1000 as amended by Session Law (SL) 2008-211 and as subsequently amended on January 1, 2017 (2017 Rules) (collectively, the "stormwater rules') the approved stormwater management plans and specifications and other supporting data as attached and on file with and approved by the Division of Energy, Mineral and Land Resources (the "Division" or "DEMLR") and considered an enforceable part of this permit. This permit shall be effective from the date of issuance until October 21, 2024, and shall be subject to the following specified conditions and limitations: I. DESIGN STANDARDS This permit is effective only with respect to the nature and volume of stormwater described in the application and other supporting data. 2. This stormwater system has been approved for the management of stormwater runoff as described in Section 1.8 of this permit. The runoff from all built -upon area within the permitted drainage areas of this project must be directed into the permitted stormwater control measures. The stormwater control measures labeled Pond A and Pond B have been designed to handle the runoff from 155,921 and 86,000 square feet of built -upon area, respectively. 3. The maximum built -upon area allowed for the entire project is 241,921 square feet. 4. The drainage areas will be limited to the amounts of built -upon area indicated in Sections 1.2 and 1.8 of this permit, and per approved plans. The built -upon area for future development within the drainage area for Pond A is limited to 46,300 square feet. This permit does not provide any allocation of built -upon area for future development within the drainage area for Pond B. 5. A 50' wide vegetative buffer must be provided and maintained adjacent surface waters, measured horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of both sides of streams and rivers and the mean high water line of tidal waters. 6. Vegetated filter strips are not required for these ponds as they have been designed for a 90% total suspended solids removal efficiency. 7. All runoff being directed into wetlands shall flow into and through those wetlands at a non - erosive velocity. Page 1 of 6 State Stormwater Management Systems Permit No. SW8 160910 8. The following design criteria have been permitted for the wet detention pond and it must be provided and maintained at the design condition: Pond A Pond B a. Drainage Area, acres: Onsite, SL 2008-211, ft2: Onsite, 2017 Rules, ft2: Offsite, ft2: 4.90 193,939 19,661 0 2.66 114,500 1,500 0 b. Total Impervious Surfaces, ft2: Onsite, ftz: Offsite, ft2: 155,921 136,260 19,661 86,000 84,500 1,500. c. Average Pond Design Depth, feet: 4.7 4.0 d. TSS Removal Efficiency: 90% 90% e. Design Storm, inches: 1.5 1.5 f, Permanent Pool PP Elevation, FMSL: 54.5 54.5 g. Permitted PP Surface Area, ftz: 20,183 7,628 h. Tem ora Storage Elevation, FMSL 55.5 56.0 i. Permitted Storage Volume, ft3: 21,447 12,785 j. Predevelopment 1 yr-24 hr. discharge rate, c€s: 6.29 3.89 k. Controlling Orifice, inch O pipe: 2.50 1.75 I. Orifice Flow Rate, cfs: 0.10 0.10 m. PP Volume, ft3: 79,320 21,985 n. Forebay Volume, ft3: 15,378 4,008 o. Maximum Fountain Horsepower: 114 n/a p. Receiving Stream/River Basin: Banton Branch Stream Index Number: 18-77-1-1-2 r. Classification of Water Body: C II. SCHEDULE OF COMPLIANCE 1. The stormwater management system shall be constructed in its entirety, vegetated and operational for its intended use prior to the construction of any built -upon surface. 2. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired immediately. If the stormwater system is used as an Erosion Control device, it must be restored to design condition prior to operation as a stormwater treatment device, and prior to occupancy of the facility. 3. The permittee shall at all times provide the operation and maintenance necessary to assure that all components of the permitted stormwater system function at design condition. The approved Operation and Maintenance Agreement is incorporated by reference into this permit and must be followed in its entirety and maintenance must occur at the scheduled intervals. 4. Records of maintenance activities must be kept and made available upon request to authorized personnel of the Division. The records will indicate the date, activity, name of person performing the work and what actions were taken, 5. Since the permanent pool volume for Pond A is greater than 30,000 cubic feet, a decorative spray fountain will be allowed in the stormwater treatment system, subject to the following criteria: a. The fountain must draw its water from less than 2' below the permanent pool surface. b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only if they draw water from the surface in the deepest part of the pond. c. The falling water from the fountain must be centered in the pond, away from the shoreline. d. The maximum horsepower for a fountain in this pond is 114 horsepower. A decorative spray fountain will not be allowed in Pond B as the permanent pool volume is less than 30,000 cubic feet. Page 2of6 State Stormwater Management Systems Permit No. SW8 160910 6. The facilities shall be constructed, operated and maintained in accordance with the conditions of this permit, the approved plans and specifications, and other supporting documents attached to this permit and on file with the Division. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this permitted facility, the permittee shall cause a certification from an appropriate designer for the system installed to be submitted, certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documentation. Any deviations from the approved plans and specifications must be noted on the Certification. A modification may be required for those deviations. 8. All stormwater collection and treatment systems must be located in either public rights -of -way, dedicated common areas or recorded easements. The final plats for the project will be recorded showing all such rights -of -way, common areas and easements, in accordance with the approved plans. Access to the stormwater facilities for inspection and maintenance shall be maintained via appropriate recorded easements at all times. 9. No person or entity, including the permittee, shall alter any component shown in the approved plans and specifications. Prior to the construction of any modification to the approved plans, the permittee shall submit to the Director, and shall have received approval for modified plans, specifications, and calculations including, but not limited to, those listed below. For changes to the project or SCM that impact the certifications, a new or updated certification(s), as applicable, will be required and a copy must be submitted to the appropriate DEQ regional office upon completion of the modification. a. Any modification to the approved plans and specifications, regardless of size including the SCM(s), BUA, details, etc. b. Redesign or addition to the approved amount of BUA or to the drainage area. c. Further development, subdivision, acquisition, lease or sale of any, all or part of the project and/or property area as reported in the approved plans and specifications. d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the approved plan. e. The construction of any allocated future BUA. f. The construction of any permeable pavement, #57 stone area, public trails, or landscaping material to be considered a permeable surface that were not included in the approved plans and specifications. g. Other modifications as determined by the Director 10. Prior to transfer of the permit, the stormwater facilities will be inspected by Division personnel. The project and the stormwater facility must be in substantial compliance with all permit conditions. Any items not in substantial compliance must be repaired, replaced or restored to design condition prior to the transfer. Records of maintenance activities performed to date will be required. 11. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. III. GENERAL CONDITIONS Any individual or entity found to be in noncompliance with the provisions of a stormwater management permit or the Stormwater rules is subject to enforcement procedures as set forth in NCGS 143 Article 21. 2. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances, which may be imposed by other government agencies (local, state, and federal) having jurisdiction. 3. In the event that the facilities fail to perform satisfactorily the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement stormwater management systems. Additional or replacement stormwater management systems shall receive a permit from the Division prior to construction. Page 3 of 6 State Stormwater Management Systems Permit No. SW8 160910 4. Current Permittee Name or Address Changes: The permittee shall submit a completed "Permit Information Update Application Form" (available on the Division website) to the Division within 30 days to making any one or more of the following changes: a. A name change of the current permittee; b. A name change of the project; c. A mailing address change of the permittee; 5. Permit Transfer: This permit is not transferable to any person or entity except after notice to and approval by the Director. The permittee shall submit a completed and signed "Permit Transfer Application Form" (available on the Division website) accompanied by the required fee and supporting documentation as listed on the form, to the Division at least 60 days prior to any one or more of the following events: a. The sale or conveyance of the project area in whole or in part, except in the case of an individual lot sale that is made subject to the recorded deed restrictions and protective covenants; b. Dissolution of the partnership, corporate, or LLC entity, subject to NCGS 55-14-05 or NCGS 57D-6-07 and 08; c. Bankruptcy; d. Foreclosure, subject to the requirements of Session Law 2013-121; 6. The permittee is responsible for compliance with all permit conditions until such time as the Division approves the transfer request. Neither the sale of the project, in whole or in part, nor the conveyance of common area to a third party constitutes an approved transfer of the stormwater permit. 7. The permittee grants DEMLR Staff permission to enter the property during normal business hours for the purpose of inspecting all components of the permitted stormwater management facility. 8. The permit issued shall continue in force and effect until the permittee files a request with the Division for a permit modification, transfer, renewal, or rescission; however, these actions do not stay any permit conditions. 9. Approved plans, calculations, supplement forms, operation and maintenance agreements and specifications for this project are incorporated by reference and are enforceable parts of the permit. A copy of the approved plans and specifications shall be maintained on file by the Permittee at all times. 10. Unless specified elsewhere, permanent seeding requirements for the stormwater control measure must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. 11. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules and regulations contained in Session Law 2006-246, Title 15A NCAC 2H.1000, and NCGS 143-215.1 et.al. 12. A permit renewal request must be submitted at least 180 days prior to the expiration date of this permit. The renewal request must include the appropriate application, documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3). Permit modified, updated, and re -issued this the 21It day of November 2019. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION 1) "&!,!a a -a r S. Daniel Sftph, Director Division of Energy, Mineral and Land Resources By Authority of the Environmental Management Commission Permit Number SW8 160910 Page 4 of 6 State Stormwater Management Systems Permit No. SW8 160910 Enterprise Drive Self Storage Stormwater Permit No. SW8 160910 Brunswick County Designer's Certification 1, , as a duly registered in the State of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the construction of the project, (Project) for (Project Owner) hereby state that, to the best of my abilities, due care and diligence was used in the observation of the project construction such that the construction was observed to be built within substantial compliance and intent of the approved plans and specifications. The checklist of items on page 2 of this form is included in the Certification. Noted deviations from approved plans and specifications: Signature Registration Number Date SEAL Page 5 of 6 State Stormwater Management Systems Permit No. SW8 160910 Certification Requirements: The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The outlet structure elevations are per the approved plan. �. The outlet structure is located per the approved plans. 7. Trash rack is provided on the outlet structure. 8. Ali slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. Required drawdown devices are correctly sized and located per the approved plans. 13. All required design depths are provided. 14. All required parts of the system are provided, such as a vegetated shelf, and a forebay. 15. The required system dimensions are provided per the approved plans. 16. All components of the stormwater BMP are located in either recorded common areas, or recorded easements. cc: NCDEQ-DEMLR Wilmington Regional Office Brunswick County Building Inspections Page 6 of 6 Attachment C - Permitting History Enterprise Drive Self -Storage Permit No. SW8 160910 Approval Date Permit Action BiMS Version Description of the Changes 10/21/2016 Original Approval 1.0 2 wet ponds; subject to SL 2008-21 1 1 1/21/2014 Major Modification 1.1 1. Pond A: Increasing the drainage area (DA) and built -upon area (BUA) directed to this pond. Re -allocating the BUA to reflect the as -built condition. Permitting the as -built surface areas and resulting volumes. Permitting the relocation of the orifice to avoid short-circuiting the pond. 2. Pond B: Re -allocating the BUA to reflect the as -built condition. Permitting the as -built surface areas and resulting volumes. Page 1 of 1 ` Operation' & Maintenance Agreement Project Name: Project Location: OMW4 66- K AWM 5 45 f �%d vM se - Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s). The BMP(s) on this project include (check all that apply & c Bioretention Cell Quantity: Dry Detention Basin Quantity: Grassed Swale Quantity: Green Roof Quantity: Infiltration Basin Quantity: Infiltration Trench Quantity: Level SpreaderNFS Quantity: Permeable Pavement Quantity: Proprietary System Quantity: Rainwater Harvesting Quantity: Sand Filter Quantity: Stormwater Wetland Quantity: Wet Detention Basin Quantity: Disconnected Impervious Area Present: User Defined BMP Present: ing 0&M tables wil Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): Location(s): be apaeo autom CLICK TO UPDATE O&M MANUAL I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to the system or responsible party. Responsible Party: Title & Organization: Street address: City, state, zip: Phone number(s): Email: Bill Schoettelkotte Manager, WCM Enterprises, LLC 305 Colonial Dr Wilmington, NC 28403 919-880-0063 bschoettelkotte@gmail.com Signature: �' `'y _ Date: I, n h 1 I I - a Notary Public for the State of r N`_ �_L ' County of P4P Kd &- do hearby certify that i 1 S,h c e- 44c I ko 4e, personally appeared before me this 22 d of 1, �� 9 and ,� acknowledge the due execution of Witness my hand and official seal, ons a M ,,siinyWce Agreement . NOTARY PUBLIC _ WE C E I CJ r APR 2 9 201-9 914 a-- Sea! wkun,u„nW My commission expires STORM-EZ 4/18/2019 Version 1.4 O&M Manual Page 1 of 1 • � �y '! � 1 �� � � y' � _� 1 � Ir ' �� � . � � � .. irk. r I � 1 . ! • � .\. � . . . r ' �• � L / � i � f • ,i 1 ti."l •, .iF;•jf��,� • �i..{t: r.: �t � �7� Zy ''.fie "Nip. �r�nt:..ltru� Wet Detention Pond .Maintenance Requirements i The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if one is provided. Important maintenance procedures: Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the basin should be watered twice weekly if needed, until the plants become established (commonly six weeks). No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to establish the plants on the vegetated shelf. Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention basin. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain should be minimized to the maximum extent practical. - Once a year, a dam safety expert should inspect the embankment. After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a known set location and must be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: The entire BMP Trash/debris is present. Remove the trash/debris. The perimeter of the BMP Areas of bare soil andlor Regrade the soil if necessary to remove the gully, and then plant a erosive gullies have formed. ground cover and water until it is established. Provide lime and a one- time fertilizer application. Vegetation is too short or too Maintain vegetation at a height of approximately six inches. long. The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged. Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion swale. control devices such as reinforced turf matting or riprap to avoid future problems with erosion. Stone verge is clogged or Remove sediment and replace with clean stone. covered in sediment (if applicable). The forebay Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where original design depth for it will not cause impacts to streams or the BMP, sediment storage. Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. The vegetated shelf Best professional practices Prune according to best professional practices show that pruning is needed to maintain optimal plant health. Plants are dead, diseased or Determine the source of the problem: soils, hydrology, disease, etc. dying. Remedy the problem and replace plants. Provide a one-time fertilizer application to establish the ground cover if a soil test indicates it is necessary. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. STORM-EZ Version 1.4 O&M Manual ECEIVE " APR 2 9 2 €9 4129/2019 �Y:----- Page 2 of 4 v' Wet Detention Pond Maintenance Requirements (Continued)" i The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if a depth greater than the possible. Remove the sediment and dispose of it in a location where original design sediment it will not cause impacts to streams or the BMP. storage depth. Algal growth covers over 50% Consult a professional to remove and control the algal growth. of the area. Cattails, phragmites or other Remove the plants by wiping them with pesticide (do not spray), invasive plants cover 50% of the basin surface. The embankment Shrubs have started to grow Remove shrubs immediately. on the embankment. Evidence of muskrat or Use traps to remove muskrats and consult a professional to remove beaver activity is present. beavers. A tree has started to grow on Consult a dam safety specialist to remove the tree. the embankment. An annual inspection by an Make all needed repairs. appropriate professional shows that the embankment needs repair. if applicable) The outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment off -site. The outlet device is damaged Repair or replace the outlet device. The receiving water Erosion or other signs of Contact the local NC Department of Environment and Natural damage have occurred at the Resources Regional Office. outlet. The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. ECEIAV '. APR 2 9 20 BY: STORM-eZ 4/29/2019 Version 1.4 O&M Manual Page 3 of 4 r � • i Wet Detention Pond Design Summary 1 WET POND ID POND A Pretreatment other No than forebay? Was Veg, Filter? No WET POND ID POND B Pretreatment other No thanforebay? Has Veg. Fitter? No FOREBAY MAIN POND Permanent Pool El. 54.5 Permanent Pool El. 54.5 Temporary Pool El: 55.5 Temporary Pool El: 55.5 Clean Out Depth: 5.5 Clean Out Depth: 6.5 Sediment Removal El: 49 Sediment Removal El: 48 Bottom Elevation: 48 Bottom Elevation: 47 FOREBAY MAIN POND Permanent Pool El. 54.5 Permanent Pool El. 54.5 Temporary Pool EL 56 Temporary Pool El: 56 Clean Out Depth: 5.5 Clean Out Depth: 6.5 Sediment Removal El: 49 Sediment Removal El: 48 Bottom Elevation: 48 Bottom Elevation: 47 ECEIVIS AUG BY: STORM-EZ 8/912019. Version 1.4 O&M Manual Page 4 of 4 M ENTERPRISE DR SELF STORAGE BRUNSWICK COUNTY, NORTH CAROLINA STORMWATER ASBUILT NARRATIVE Prepared for: WCM Enterprises, LLC 305 Colonial Drive Wilmington, NC 28403 Prepared by: PAT?,�A1\4C)UT'-*-TTE E N C3 1 N E E FE 1 N 4. 1 N C. 122 Cinema Drive Wilmington, NC 28403 (910) 791-6707 ,CA�o Z/ NC License #: C-2846 `\� OQ, .... d 9 2 ¢pF 9 J :a SEAL Projcct #13119.PE = 034354 .FNG f AUGUST 2019 eRANG�+S ECEIVE AUG 12 20i9 BY: ENTERPRISE DR SELF STORAGE BRUNSWICK COUNTY, NORTH CAROLINA Table of Contents PROJECT Narrativc ASBUILT STORMWA"FER CONTROL. MEASURES ATTACHMENTS: Stormwater Calculations PRO ECT NARRATIVE WC'i%7 Enterprises is developing a proposed self -storage facility located on US 74/76 at the intersection of Enterprise Drive, which is Leland Industrial Park or Windsor Commercial Park. It is further identified by Brunswick County PIN #: 218809062699, Parcel ID 0280000842 (10.70+/- ac), and coordinates: Lat: 34' 15' 33.39"N, I-ong: 78' 4' 22.94" W. The site is adjoined by US 74/76 to the south, a Duke Energy substation and shop to the west, Enterprise Drive to the east, and Trade Street to the North cleared property except the east, which is residential use. A Duke Energy Transmission 70-ft ROW (Sutton Line 230Kv South) runs across the property. The current site consists of 0-1% sloped terrain with part woods. The existing soils on the site are predominantly Leon fine sand (Lo) according to the Web Soil Survey of MRCS. According to the attached USGS map, the site drains to Banton Branch, which is classified as C; SW in Cape Fear River Basin. ASBUILT STORMWATER CONTROL MEASURES Two wet retention ponds are being used to treat the 1.5-inch rainfall -runoff per NCDEQ State Stormwater Coastal Rules and provide peak discharge control below pre -developed runoff for the 1-yr and 10-yr design storms per the Brunswick County Stormwater Ordinance. The wet pond was calculated utilizing SCS TR-20 hydrograph routing simulations through use of I-lydroCAD modeling software. The treatment requirements for the 1.5-inch rainfall runoff were calculated using the Simple Method Runoff Calculation and the 90°/, TSS removal requirements of a wet detention pond as described in the NCDEQ Stormwater BM Manual. Storm conveyance calculations have been performed utilizing the Rational Method for the I0-yr and I00-yr design storms to check for flood control within the pipe system. The hydraulic grade line (HGL) calculations were performed through the Carlson Drainage Software using HEC22 Energy -Loss Method. The published Brunswick County ID1~ Tables have been used for the design storms. Enterprise Dr Self Storage Pond A [ASBUILT] NCDEQ Wet Retention Basin Requirements Objective: Design a wet retention basin with the following characteristics: a permanent water pool depth between 3- and 6-Feet, a surface area that meets TSS removal requirements (values set by NCDEQ and Included here), a forebay that is approximately 20% of the total pond volume, a temporary water pool sized to detain the initial 1.5 inch of rainfall runoff an outlet device that drains the temporary water pool within 2-5 days, and a length -to -width ratio of approximately 3:1. Step 1: Determine the surface area required for 90% TS5 removal Post -Development Conditions Total Drainage Area 4.90 ACRE Value from CAD Impervious Drainage Area 3.58 ACRE Value from CAD Impervious Cover 73.0% Impervious Cover=(Impervious Drainage Area)/(Total Drainage Area) *100% Elevation of Permanent Pool Surface 54.5 FT Value selected by designer Avg. Depth of Permanent Pool 4.7 FT Value from Avg. Depth Calculation Option 2 Elevation of Wet Detention Pond Bottom 47.0 FT (Bottom Elevation)=(Permanent Pool Surface Elevation) -(Depth of Permanent Pool) Approximate Pond Length 200 FT Value from CAD A roximate Pond Width 90 FT Value from CAD Len th:Width Ratio 2.2.1 Ratio= Len th Width :1 Required SA/DA Ratio for 90% TSS Removal 5.77 Value from chart. Reference: 90% TSS Removal Required Permanent Pool Surface Area 12,325 SF Required Surface Area=(Required SAIDA Ratio) *(Total Drainage Area) Provided Permanent Pool Surface Area 20,183 SF From stage -storage calculations Average Depth Calculation: (Option 2 per Errata) Pond #1 Aeutw,$,If = 16,467 sf main+forebay As.,_pw = 6,116 sf main only eKcluding sed storage A;�—pw = 20,183 sf main+forebay Depth = 5.5 ft Bottom of shelf to sed storage d., = 4.7 • ' . ft Based on 6-ft shelf (0.50 not 0.2! SA/DA 5.77 Step 2: Determine the 1.5-inch runoff elevation within the wet detentionpond. Runoff Coefficient, Rv �0.707 IN/IN Rv=0.05+0.009*(110 Impervious) Required 1.5" Runoff Volume 18,876 CF 1.5"Runoff Volume=1.5 inch*Rv*1 fooV12 (Volume of TemDorary Pool) inch*(Total Drainaoe Area) Permanent Pool Volume 79,320 CF Value from stage -storage calculations (cumulative pond volume at permanent pool elevation) Tntal Vnlump to hp Cnntrnlled qR_ IqF, [F Total Volume to be Controlled=(Volume Below { - - -- ` - - -- - - Permanent Pool) +0.5" Runoff Volume) Storage Elevation at Required Volume 55.37 FT Value is interpolation based upon stage -storage values. See stage-storaoe calculations Storage Elevation Provided 55.50 FT Value chosen by designer PPool Volume 79,320 CF Total PPool Volume Required Forebay Volume 15,864 CF Forebay Volume=(Total Pond Volume)*20% NOV+. n.�1 �+, BY.--- -- - Provided Forebay Volume 15,378 CF Value from stage -storage calculations Provided Forebay Volume:Total Pond Volume 19.2% (Provided Forebay Volume)/(Total Pond Volume) *100% Step 4. Verify that time required to drawdown the 1.5-inch runoff volume is within 2 to 5 days. Diameter of Proposed Low -Flow Orlflce 2.50 SIN Value chosen by designer Elevation of Temp Pool 55.50 FT Provided Storage Vol Elev. Total Elevation Head Above Orifice 1.00 FT (Total Elevation Head Above Orifice)=(Weir Elevation) -(Elevation of Permanent Pool Surface) (Average Elevation Head Above Orifice)=((Storage Average Elevation head Above Orifice 0.33 FT Elevation at Required Volume)+(Elevation of Permanent Pool Surface)]/3-(Storage Elevation at Reoulred Volume) Cd, Coefficient of Discharge 0.60 Value chosen by designer Q, Flowrate Through Low -flow Orifice 0.09 CFS4=Cd-(Pi)*((DiameterofOriflce)*(1 ft/12 in)]A2/4*[2*32.2*(Average Head)]A1/2 (Drawdown Time)=(1.5" Runoff volume)/ Drawdown Time for 1.5-Inch Runoff 2.31 DAYS * 1 da 86400 seconds Enterprise Dr Pond A [ASBUILT] Stage -Area -Storage Calculations Stage/Storage Above Permanent Pool (Including Forebay) Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) (CF) 54.5 20 183 0 0 ----Permanent Pool 55.0 21,442 10,406 10,406 55.5 22,720 11,041 21,447 56.0 23,998 11,680 33,126 57.0 26,633 25,316 58,442 58.0 28,661 27,647 86,089 • .Top of Pond Stage/Storage Total Pond (Including Forebay) Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) (CF) 47.0 4,550 0 0 --Pond Bottom 48.0 6,781 5,666 0 Sediment Storage 49.0 8,343 7,562 7,562 50.0 8,901 8,622 16,184 51.0 11,846 10,374 26,558 52.0 13,174 12,510 39,068 53.0 14,965 14,070 53,137 53.5 16,467 7,858 60,995 ----Bottom of Shelf 54.5 20,183 18,325 79,320 -.Permanent Pool 55.0 21,442 10,406 89,726 56.0 23,998 22,720 112,446 57.0 26,633 25,316 137,762 58.0 28,661 27,647 165,409 • Top of Pond Forebay Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) (CF) 48.0 665 0 0 ----Forebay Bottom 49.0 1,107 0 0 --Sediment Storage 50.0 1,645 1,376 1,376 51.0 2,219 1,932 3,308 52.0 2,862 2,541 5,849 53.0 3,568 3,215 9,064 54.0 4,318 3,943 13,007 54.5 5,169 2,372 15,378 • -Forebay Volume Enterprise Dr Self Storage Pond B [ASBUILT] _ NCDEQ Wet Retention Basin Requirements Objective: Design a wet retention basin with the following characteristics: a permanent water pool depth between 3- and 6-feet, a surface area that meets TSS removal requirements (values set by NCDEQ and included here), a forebay that is approximately 20% of the total pond volume, a temporary water pool sized to detain the initial 1.5 inch of rainfall runoff, an outlet device that drains the temporary water pool within 2-5 days, and a length -to -width ratio of approximately 3:1. Step 1: Determine the surface area required for 90% TSS removal Post -Development Conditions Total Drainage Area 2.66 ACRE Value from CAD Impervious Drainage Area 1.97 ACRE Value from CAD Impervious Cover=(hmpervious Drainage Area)/(Total Impervious Cover 741%n Drainage Area) 100 /o Elevation of Permanent Pool Surface 54.5 FT Value selected by designer Avg. Depth of Permanent Pool 4.0 FT Value from Avg. Depth Calculation Option 2 Elevation of Wet Detention Pond Bottom 47.0 FT (Bottom Elevation)=(Permanent Pool Surface Elevation) -(Depth of Permanent Pool) Approximate Pond Length 170 FT Value from CAD A roximate Pond Width 63 FT Value from CAD Len th:Width Ratio 3:1 Ratio= Len th Width :! Required SA/DA Ratio for 90% TSS Removal 6.40 Value from chart. Reference: 90% TSS Removal Required Permanent Pool Surface Area 7,424 SF Required Surface Area=(Required SAIDA Ratio)*(Total Drainage Area) Provided Permanent Pool Surface Area 7,628 SF From stage -storage calculations Step 2: Determine the 1.5-inch runoff elevation within the wet detention pond. _ Runoff Coefficient, Rv 0.717 IN/IN Rv=0.05+0.009*(% Impervious) Required 1.5" Runoff Volume 10,400 CF 1.5" Runoff Volume=1.5 inch*Rv*1 fooV12 (Volume of Temporary Pool) inch*(Total Drainage Area) Permanent Pool Volume 21,985 CF Value from stage -storage calculations (cumulative pond volume at permanent D001 elevation) Total VoWme to hn f ont�nlled a�_sRs rF Total Volume to be Controlled=(Volume Below ___. __._..._ __ __ __-._-_-.__ --•--- - Permanent P001)+(1.5"Runoff Volume) Storage Elevation at Required Volume 55.73 FT Value is interpolation based upon stage -storage values. See stage -storage calculations _ Storage Elevation Provided 56.00 FT Value chosen by designer Step 3a: Calculate the required forebay volume (18-22% of perm. pool volume) and compare to the forebay volume provided. PPool Volume 21,985 CF Total PPool Volume Required Forebay Volume 4,397 CF Forebay Volume=(Total Pond Volume)*20% Provided Forebay Volume 4,008 CF Value from stage -storage calculations Average Depth Calculation: (Option 2 per Errata) Pond #1 ABottW shell = 5,602 sf main+forebay Ago,,, gold = 867 sf main excluding sed storage Ape,m pwl = 7,628 5f main+forebay Depth = 5.5 ft Bottom of shelf to sed storage d-g = ft Based on 6-ft shelf (0,50 not 0.2' SA/DA 6.4 Provided Porebay Volume:Total Pond Volume 18-20/a (Provided Foreebay Volume)/(Total Pond Volume) 100 /o Step 4: Verify that time required to drawdown the 1.5-inch runoff volume is within 2 to 5 days. Diameter of Proposed Low -flow Orifice 1,75 IN Value chosen by designer Elevation of Temp Pool 56.00 FT Provided Storage Vol Elev. Total Elevation Head Above Orifice 1.50 FT (Total Elevation Head Above Orifice)=(Weir Elevation) - (Elevation of Permanent Pool Surface) (Average Elevation Head Above Orifice)=((Storage Average Elevation Head Above Orifice 0.50 FT Elevation at Required Volume)t(Elevation of Permanent Pool Surface)]/3-(Storage Elevation at Required Volume) Cd, Coefficient of Discharge 0.60 Value chosen by designer Q, Flowrate Through Low -flow Orifice 0.05 CF5 Q=Cd*(Pi)*((Diameter of Orifice)*(1 ft/12 in)J^214*(2*32.2*(Average Head)JA112 (Drawdown Time) =(1.5" Runoff Volume)/Q*(1 Drawdown Time for 1.5-inch Runoff 2.54 DAYS _ ,__ Enterprise Dr Pond B [ASBUILT] Stage -Area -Storaa Calculations Stage/Storage Above Permanent Pool (Including Forebay) Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) (CF) 54.5 7,628 0 0 *Permanent Pool 55.0 8,219 3,962 3,962 56.0 9,427 8,823 12,785 57.0 10,660 10.044 22,828 58.0 11,956 11,308 34,136 59.0 13,266 12,611 46,747 •-Top of Pond Stage/Storage Total Pond (Including Forebay) Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) (CF) 47.0 416 0 0 •Pond Bottom 48.0 960 0 0 -.-Sediment Storage 49.0 1,488 1,224 1,224 50.0 2,131 1,810 3.034 51.0 2,780 2,456 5,489 52.0 3,616 3,198 8,687 53.0 4,633 4,125 12,812 53.5 5,602 2,559 15,370 -Bottom of Shelf 54.5 7,628 6,615 21,985 -.Permanent Pool 55.0 8,219 3,962 25,947 56.0 9,427 8,823 34,770 57.0 10,660 10,044 44,814 58.0 11,956 11,308 56,122 59.0 13,266 12,611 68,733 -Top of Pond Forebay Cumulative Contour Incremental Volume, S Contour Area (SF) Volume (CF) (CF) 48.0 93 0 0 Forebay Bottom 49.0 203 148 0 --Sediment Storage 50.0 379 291 291 51.0 686 533 824 52.0 878 782 1,606 53.0 1,162 1,020 2,626 53.5 1.396 640 3,265 54.5 1,569 743 4,008 FForebayVolume PARAMOUNTE E N 4 1 N E E M I N C3. 1 N C. November 13, 2019 Ms. Christine Hall ! V Z NCDEQ -- DEMLR — Stormwater Program 127 Cardinal Drive Extension Wilmington, NC 28405 Nov io» RE: SW8 160910 Modification Enterprise Drive Self Storage Leland, Brunswick County Dear Ms, Hall: On behalf of Bill Schoettelkotte and WCM Enterprises, LLC, we are responding to the above referenced Request for Additional Information for Stormwater Permit SW8 160910 dated October 31, 2019 after the changes were submitted August 12. Please find below our responses in bold bullets. 1. 15A NCAC 02H.1008(e)(4) effective September 1, 1995: The revised site plans propose a 3" conduit to be installed along the pond bank to improve the flow path of the system and prevent the pond from short circuiting. Please provide additional details of this proposed conduit including invert elevations and the design proposed for the end cap / orifice area. • Design Details added to Sheet ABA and AB-2. 2. 15A NCAC 02H.1042(2)(0: For Pond A, please confirm the following information: a. The SA/DA ratio. The SA/DA ratio presented in the revised calculations differs from the ratio presented in the revised supplement. Additionally, the SA/DA ratio presented in the calculations for this 90% TSS removal pond with an average depth of 4.7 ft and an impervious percent of 73% is not consistent with the SA/DA table in place when this pond was permitted. • We just rounded down to 4.5 and used 5.77. It can be 5.66 but it makes no impact to the calculations as we are far exceeding the required SA. I think the spreadsheet had a number in error of 5.49 SAIDA. b. The surface area for this pond at an elevation of 55.0 ft presented in the stage -storage tables. This surface area is smaller than the surface area presented at an elevation of 54.4 ft. • The 54.5 elevation contour area should have been 20,183sf and not 21,542sf, Calcs and supplements changed as well. c. The surface area at the bottom of the vegetated shelf presented in the revised supplement. The surface area presented in the supplement for the bottom of the vegetated shelf is the surface area of the permanent pool, • Supplement revised. Please find revised documents and maps. Sincerely, J. Branch Smith, PE Cc: WCM Enterprises, LLC / Bill Schoettelkotte LIP Mini Storage, LLC 1 2 2 CINEMA D R I V E, WI L NII N G T O N, N C 2 a 4 ❑ 3 P H : 1 9 1 0 ) 7 9 1 • 6 7 0 7 F A X., (9 1 O) 79 1 - 6 7 6 O ROY COOPER Governor MICHAEL S. PEGAN Secretary S. DANIEL SMITH NORTH CAROLINA Director Environmental Quality October 31, 2019 Via email only: bschoettelkottK&,-mail.com WCM Enterprises, LC Attn: William Schoettelkotte, Member -Manager 305 Colonial Drive Wilmington, NC 28403 Subject: Request for Additional Information Stormwater Project No. SW8 160910 Enterprise Drive Self -Storage Brunswick County Dear Mr. Schoettelkotte: The Wilmington Regional Office received and accepted a modified State Stormwater Management Permit Application for the subject project on April 29, 2019 with additional information requested on July 11, 2019 and received on August 12, 2019. A preliminary in-depth review of that information has determined that the application is not complete and that additional information is needed. To continue the review, please provide the following additional information: Vr 15A NCAC 02H.1008(e)(4) effective September 1, 1995: The revised site plans propose a 3" conduit to be installed along the pond bank to improve the flow path of the system and prevent the pond from short circuiting. Please provide additional details of this proposed conduit including invert elevations and the design proposed for the end cap / orifice area. V'."2. 15A NCAC 02H.1042(2)(0: For Pond A, please confirm the following information: ✓a. The SA/DA ratio. The SA/DA ratio presented in the revised calculations differs from the ratio presented in the revised supplement. Additionally, the SA/DA ratio presented in the calculations for this 90% TSS removal pond with an average depth of 4.7 ft and an impervious percent of 73% is not consistent with the SA/DA table in place when this pond was permitted. ,/6. The surface area for this pond at an elevation of 55.0 ft presented in the stage -storage tables. This surface area is smaller than the surface area presented at an elevation of 54.4 ft. /c. The surface area at the bottom of the vegetated shelf presented in the revised supplement. The surface area presented in the supplement for the bottom of the vegetated shelf is the surface area of the permanent pool. Please remember to confirm that any revised information is presented consistently throughout the application documents including calculations, supplements, narrative, and plans. Please also remember to provide two hard copies of any updated documents per 15A NCAC 02H.1042(2). All of the requested information listed above should be received in this Office by November 14, 2019, or the application will be returned as incomplete. Please note that only two letters requesting additional information is allowed in the State Stormwater Program for a total of 30 days to submit the requested additional information. If the information is not satisfactorily provided after this second request, the project will he returned. If the project is returned and you wish to re -submit later, you will need to resubmit all required items at that time, including the application fee. Please reference the State assigned project number on all correspondence. If you have any questions concerning this matter, please feel free to call me at (910) 796-7215 or email me at christine.hall@ncdenr.gov. DEQNorth �� Carolina Department of Environmental Quallty I Division of Energy. Mineral and Land Resources Wilmington Regional Offlce 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405 NORTH GqsouNA 410.796.7215 r State Stormwater Permit No. SW8 160910 Page 2 of 2 ; Sincerely, 6kace qa& Christine Hall Environmental Engineer GDS/canh: \\1StormwaterlPermits & Projects120161190610 HD12019 10 addinfo 160910 cc: Branch Smith, PE; Paramounte Engineering, Inc.; via email: bsmithoparamounte-eng.com Wilmington Regional Office Stormwater File Hall, Christine From: Hall, Christine Sent: Thursday, October 31, 2019 11:28 AM To: Branch Smith; bschoettelkotte@gmail.com Subject: 2nd request for additional info - Enterprise Drive Self Storage, SW8 160910 Attachments: 2019 10 addinfo 160910.pdf Gentlemen, Attached is a pdf of the request for additional information for the subject project. There are just a few administrative items that need to be addressed. Also, since this is in the home stretch and I understand there is a need to transfer the permit after this modification. Since this site is under an NOV and the new property owners have not submitted a plan of action to resolve these items, the transfer cannot be accepted for review until these items are resolved, constructed, and the following is submitted: a new certification covering the revisions to the pond and site, an 0&M signed by the new owners, and a $505 transfer application fee. Please let me know if you have any questions or concerns. Christine Hall Environmental Engineer Division of Energy, Mineral and Land Resources — State Stormwater Program Department of Environmental Quality 910 796 7215 office 910 796 7335 direct christine.hall@ncdenr.gov 127 Cardinal Drive Ext. Wilmington, NC 28405 Nothing Compares —,,,,— Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. PARAMOUNTE E N C3 1 N E E F2 I N C3 . 1 N C. August 9, 2019 Ms. Christine Hall NCDEQ — DEMLR — Stormwater Program 127 Cardinal Drive Extension Wilmington, NC 28405 RE: SW8 160910 Modification Enterprise Drive Self Storage Leland, Brunswick County Dear Ms. Hall: On behalf of Bill Schoettelkotte and WCM Enterprises, LLC, we are responding to the above referenced Request for Additional Information for Stormwater Permit SW8 160910 dated July 11, 2019, This is also in accordance with a written time extension until August 12tt, granted by your office. Please find below our responses in bold bullets. 1. 15A NCAC 02H.1008(e)(4) effective September 1, 1995: The location of the outlet structure for Pond A has been relocated adjacent to the forebay berm and inlet. The cover letter provided with the modification package indicates that the pond "should not short circuit based on the 1.5" rainfall - runoff staging of the temporarypool with a pipe flow entering the forebay deeper than the forebay top and raising the pond level till it reaches the secondary overflow. " This statement describes the hydraulics of the forebay and does not address the fact that the pond inlet and outlet structures, as - built, allows the runoff to short circuit the pond. Please re-evaluate the pond design to avoid short circuiting. • Pond A's primary orifice has been extended further along the shelf to extend the length of flow path. According to the 1995 rule above, "The inlet structure must be designed to minimize turbulence using baffles or other appropriate 'design features and shall be located in a manner that avoids short circuiting in the pond; This increases the flow path to 2:1. 2. 15A NCAC 02H.1042(2) and. 1042(3)(b): The revised application and calculations indicates that the drainage area and built -upon area draining to Pond A has increased. Please note that the increased drainage area and built -upon area are subject to the 2017 rules. Additionally, the revised calculations also include Pond B with updated surface areas and volumes. Please provide revised supplements documenting these changes. Also, please email the supplement forms to the email address provided below so that they can be preserved electronically per the regulatory requirements. • Pond A's drainage area and impervious area increased from the approved pond; however the asbuilt condition can handle the increased surface areas and volumes per the pre-2017 rules. Updated supplements have been emailed to your email address. 3. 15A NCAC 02H. I 042(2)(f): a. To support the temporary pool is designed to contain the minimum required storage volume, please provide the surface area and provided storage volume at the temporary pool elevation in the calculations, preferably in the stage -storage table. b. and .1008(e)(3) effective September 1, 1995: When using Option 2 to calculate the average depth of the pond, the area at the bottom of the pond is considered to only include the main pool. 1 2 2 CINEMA ❑ R I V E, W I L M I N G T❑ N, INC 2 8 4 ❑ P H : f 9 1 O I 7 9 1 - 6 7 ❑ 7 F A X: i 9 1 ❑ 1 79 1 . 6 7 AUG g 2 201� Please exclude the forebay from the bottom of the pond surface area used to determine the average depth of the pond. c. Pond A was previously approved as with a 90% TSS removal efficiency. If this is not changing, then based on the provided average depth and the percent of impervious surfaces, the SA/DA ratio should be higher than the 4.57 presented in the calculations. Please ensure the 90% TSS removal SA/DA table is being used to determine the SA/DA ratio for this pond. • Temp. Pool Elevation of 55.50 is shown in the stage -storage table. Option 2 calculation has been updated. The entire stage -storage values have been updated based on updated field survey. The SAIDA Ratio is re -calculated as well. 4. 15A NCAC 02H. I 042(2)(g)(iv): Please provide additional contours and/or spot elevations along the edges of the pavement and drainage areas to support the delineated drainage areas. • DA Map updated and Site Plan shows grades too. 5. 15A NCAC 02H .1042(2)(g)(v): Section IV.10 of the application identifies 21,500 sf of other BUA within the drainage area of Pond B. However, the site plans do not delineate any BUA other than the storage buildings and the access drives. Please delineate and/or identify the other BUA on the revised site plans. • Site Plan Revised to include gravel area into Pond B and assign 40,000 sf into the Other category instead of 21,500 + future sf. 6. 15A NCAC 02H.1042(2)(g)(vii): Please provide the details of the stormwater collection system, including the inverts of the piped collection system. • Storm Pipe Schedule shown. 15A NCAC 02H. I 042(2)(a)(vii): a. Please provide complete contact information for the applicant, including phone number and e-mail address, in Section Ill. Lb of the application. b. The mailing address for the property owner listed in Section III.2.b of the application is not consistent with the office mailing address on file with the Secretary of State. Please confirm the mailing address for property owner listed in Section III.2.b of the application is consistent with the information on file with the Secretary of State. At the time of the transfer, a correct address was 305 Colonial Dr. This address is no longer on the secretary of state registration for WCM Enterprises as you found out, and is now 2912 Hydrangea Place, Wilmington NC . Bill's email you already have and phone number is 910-332-1593. Per Bill and WCM, you have permission to write this on the State application or wherever is necessary. Regardless, the new permitee as part of the transfer is LIP Mini Storage, LLC and their address remains the same at 223 Greenville Ave. Bill S. is manager for both entities. Please find revised documents and maps. Sincerely, J. Branch Smith, PE Cc: WCM Enterprises, LLC 1 Bill Schoettelkotte fiECEIVE LIP Mini Storage, LLC AUG 12 2m $Y: PARAMOUNTE E N C. I N E E=- R I N G, I N C. 1 2 2 CINEMA DRIVE W I L M I N G T O N, N C 2 8 4 0 3 9 1 0- 7 9 1- 6 7 0 7( O) 9 1 0- 7 9 1- 6 7 6 0 ( F} L E T T E R O F T R A N S M I T T A L To: NCDENR — DEMLR — Land uaii , Date 8-9-19 127 Cardinal Drive 1_.xt. Wilmington, NC 28405 Re: Enterprise Dr Self Storage Stormwater Permit Mod. Review Attn: " uristine.Hall= Project No. I 13119.PE e are sendin : ® Originals he following items: ❑ Correspondence ® Prints ❑ Shop Drawings ❑ Calculations ® Plans ❑ Specifications ® Other as listed below Quantity Date Dwg. No. Description 1 Stormwater Narrative & Calcs & DA Map I Stormwater Application Form SWU-401 2 Pond A & B Supplements I LZ Operation and Maintenance Agreement 2 9 ASB-1; AS13-2 Record SW Plans and Details Issue Status, ® For Approval ❑ As Requested ❑ Construction ❑ Bid ❑ For Your Use ❑ For Review and Comment ❑ Approved as Noted ❑ See Remarks etion Taken: ❑ No Exceptions Taken ❑ Make Corrections Noted ❑ Amend & Resubmit r-1 11 _. 1 c__ Tl_-___I__ r-1 A._._._____ J __ C__L 1 r-1 __ Remarks: AUG 12 2019 the Supplements to your email, —E-mailed �C Bill Schoettelkotte, \\�GI•f Pro ernes LSilmed_ J. rant i Smith Hall, Christine From: Branch Smith <bsmith@paramounte-eng.com> Sent: Thursday, July 11, 2019 4:39 PM To: Hall, Christine Cc: Sams, Dan Subject: RE: [External] RE: request for additional info, Enterprise Drive Self Storage, SW8 160910 Oh I couldn't remember what rules the Ponds were designed with. Yes Aug 121h is fine. Bind Regards, Branch From: Hall, Christine <Christine.Hall@ncdenr.gov> Sent: Thursday, July 11, 2019 4:27 PM To: Branch Smith <bsmith@paramounte-eng.com> Cc: Sams, Dan <dan.sams@ncdenr.gov> Subject: RE: [External] RE: request for additional info, Enterprise Drive Self Storage, SW8 160910 Branch, I'm not sure that extending the drawdown pipe towards the middle of the pond will be sufficient to demonstrate the pond does not short circuit. However, we will take a look at whatever the selected solution ends up being along with your justification in further detail when you submit the revised plans. As for the extension request, I cannot grant an additional 30 days. The best I can do is grant another 15 days, however, this extension will cut into the response time if a second request for additional information is needed. Please advise if you would like an extension to August 12. I'm not clear what you are asking when you refer to converting to the 2017 rules. The submittal package did not indicate such a change was being requested. Please provide more information regarding this question. Christine Hail Environmental Engineer Division of Energy, Mineral and Land Resources — State Stormwater Program Department of Environmental Quality 910 796 7215 office 910 796 7335 direct christine. hall(a7ncdenr.gov 127 Cardinal Drive Ext. Wilmington, NC 28405 —Nothing Cornpares.—.,.. C.-I.- Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Branch Smith <bsmith@Paramounte-eng.com> Sent: Thursday, July 11, 2019 4:05 PM To: Hall, Christine <Christine,Hall@ncdenr.gov> Subject: [External] RE: request for additional info, Enterprise Drive Self Storage, SW8 160910 I guess one solution to the short-circuiting issue, is to run the drawdown orifice pipe away from the box towards the middle of the pond, right? Can you please also allow for an additional 30 days so its Aug 26, 2019? Also, you're saying we cannot simply convert the calcs to the 2017 rules? Thanks hind Regards: Branch From: Hall, Christine <Christine.Hall@ncdenr.gov> Sent: Thursday, July 11, 2019 3:57 PM To: Branch Smith <bsmith@paramounte-eng.com>; bschoettelkotte@gmail.com Cc: Sams, Dan <dan.sams@ncdenr.Rov> Subject: request for additional info, Enterprise Drive Self Storage, SW8 160910 Gentlemen, Attached is a pdf of the request for additional information for the subject project. Please let me know if you have any questions or concerns. Thanks. Christine Hall Environmental Engineer Division of Energy, Mineral and Land Resources — State Stormwater Program Department of Environmental Quality 910 796 7215 office 910 796 7335 direct christine. hall@ncden r. gov 127 Cardinal Drive Ext. Wilmington, NC 28405 Nothing Compares._ Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Director July 11, 2019 NORTH CAROLINA Environmental Quality Via email onlp: bschoettelkotte(ii)gmail.com WCM Enterprises, LC Attn: William Schoettelkotte, Member -Manager 305 Colonial Drive Wilmington, NC 28403 Subject: Request for Additional Information Stormwater Project No. SW8 160910 Enterprise Drive Self -Storage Brunswick County Dear Mr. Schoettelkotte: The Wilmington Regional Office received and accepted a modified State Stormwater Management Permit Application for the subject project on April 29, 209. A preliminary in-depth review of that information has determined that the application is not complete and that additional information is needed. To continue the review, please provide the following additional information: ry 1. 15A NCAC 02H.1.008(e)(4) effective September 1, 1995: The location of the outlet structure for Pond A has been relocated adjacent to the forebay berm and inlet. The cover letter provided with the modification package indicates that the pond "should not short circuit based on the 1.5 " rainfall -runoff staging of the temporary pool with a pipe flow entering the forebay deeper than the forebay top and raising the pond level till it reaches the secondary overflow. " This statement describes the hydraulics of the forebay and does not address the fact that the pond inlet and outlet structures, as -built, allows the runoff to short circuit the pond. Please re-evaluate the pond design to avoid short circuiting. t/ 15A NCAC 02H.1042(2) and .1042(3)(b): The revised application and calculations indicates that the drainage area and built -upon area draining to Pond A has increased. Please note that the increased drainage area and built -upon area are subject to the 2017 rules. Additionally, the revised calculations also include Pond B with updated surface areas and volumes. Please provide revised supplements documenting these changes. Also, please email the supplement forms to the email address provided below so that they can be preserved electronically per the regulatory requirements 3. 15A NCAC 02H.1042(2)(0: �,a: To support the temporary pool is designed to contain the minimum required storage volume, please provide the surface area and provided storage volume at the temporary pool elevation in the calculations, preferably in the stage -storage table. t/b. and .1008(e)(3) effective September 1, 1995: When using Option 2 to calculate the average depth of the pond, the area at the bottom of the pond is considered to only include the main pool. Please exclude the forebay from the bottom of the pond surface area used to determine the average depth of the pond. 7 c. Pond A was previously approved as with a 90% TSS removal efficiency. If this is not changing, then based on the provided average depth and the percent of impervious surfaces, the SA/DA ratio should be higher than the 4.57 presented in the calculations. Please ensure the 90% TSS removal SA/DA table is being used to determine the SA/DA ratio for this pond. t/4. 15A NCAC 02H.1042(2)(g)(iv): Please provide additional contours and/or spot elevations along the edges of the pavement and drainage areas to support the delineated drainage areas. D Q:: North Carolina Department of Environmental Quality I DMsion of Energy. Mineral and Land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington. North Carolina 28405 rw rwaw. °'+"Wmawh^r'■'""r°"ra\ /'"� 910.796.7215 State Stormwater Permit No. SW8 160910 Page 2 of 2 5. 15A NCAC 02H .1042(2)(g)(v): Section 1V.10 of the application identifies 21,500 sf of other BUA within the drainage area of Pond B. However, the site plans do not delineate any BUA other than the storage buildings and the access drives. Please delineate and/or identify the other BUA on the revised site plans. V"'6. 15A NCAC 02H.1042(2)(g)(vii).- Please provide the details of the stormwater collection system, including the inverts of the piped collection system. - .t/l. 15A NCAC 02H.1042(2)(a)(vii): Vd. Please provide complete contact information for the applicant, including phone number and e-mail address, in Section 111. Lb of the application. ✓b. The mailing address for the property owner listed in Section 111.2.b of the application is not consistent with the office mailing address on file with the Secretary of State. Please confirm the mailing address for property owner listed in Section III.2.b of the application is consistent with the information on file with the Secretary of State. Please remember to confirm that any revised information is presented consistently throughout the application documents including calculations, supplements, narrative, and plans. Please also remember to provide two hard copies of any updated documents per 15A NCAC 02H.1042(2). The requested information should be received in this Office by July 26, 2019, or the application will be returned as incomplete. If the project is returned and you wish to re -submit later, you will need to resubmit all required items at that time, including the application fee. If additional time is needed to submit the requested information, please email your extension request, prior to the original due date, to the Division at the email address provided below. The extension request must include a justification and a date of when the requested information will be submitted to the Division, which shall be no later than 15 days past the original due date. Please remember that extension requests delay the issuance of the final permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. If you have any questions concerning this matter, please feel free to call me at (910) 796-7215 or email me at christine.hall@ncdenr.gov. Sincerely, Christine Hall Environmental Engineer GDS/canh: 111StormwaterlPermits & Projects120161160910 HD\2019 07 addinfo 160910 cc: Branch Smith, PE; Paramounte Engineering, Inc., via email: hsmith@paramounte-eng.com Wilmington Regional Office Stormwater File Hall, Christine From: Hall, Christine Sent: Thursday, July 11, 2019 3:57 PM To: Branch Smith; bschoettelkotte@gmail.com Cc: Sams, Dan Subject: request for additional info, Enterprise Drive Self Storage, SW8 160910 Attachments: 2019 07 addinfo 160910.pdf Gentlemen, Attached is a pdf of the request for additional information for the subject project. Please let me know if you have any questions or concerns. Thanks. Christine Hall Environmental Engineer Division of Energy, Mineral and Land Resources — State Stormwater Program Department of Environmental Quality 910 796 7215 office 910 796 7335 direct christine.hall@ncdenr.gov 127 Cardinal Drive Ext. Wilmington, NC 28405 K. - C-1- —Nothing Compares, Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Burd, Tina J From: Burd, Tina J Sent: Monday, May 6, 2019 11:33 AM To: Branch Smith Subject: SW8 160910 - Enterprise Drive Self Storage The Wilmington Regional Office of the Division of Energy, Mineral and Land Resources (Stormwater Section) accepted the Stormwater Permit Application and $505.00 fee for the subject project on April 29, 2019. The project has been assigned to Christine Hall and you will be notified if additional information is needed. Please be advised that the construction of built -upon area may not commence until the Stormwater Permit is issued. The application did not reflect an email address for the applicant. Please provide an email address for the owner (per 15A NCAC 02H.1042(2)(a)(vii) & (xi)) so that we can notify him/her of this status. Tina Burd Administrative Associate 11 Wilmington Regional Office Division of Environmental Assistance & Customer Service Phone 910-796-7215 NCDEQ Wilmington Regional Office 127 Cardinal Drive Ext. Wilmington, NC 28405 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Burd, Tina 1 From: Burd, Tina 3 Sent: Monday, May 6, 2019 11:49 AM To: bschoettelkotte@gmail.com Subject: SW8 160910 - Enterprise Drive Self Storage The Wilmington Regional Office of the Division of Energy, Mineral and Land Resources (Stormwater Section) accepted the Stormwater Permit Application and $505.00 fee for the subject project on April 29, 2019. The project has been assigned to Christine Hall and you will be notified if additional information is needed. Please be advised that the construction of built -upon area may not commence until the Stormwater Permit is issued. Best Regards,, Tina Burd Administrative Associate II Wilmington Regional Office Division of Environmental Assistance & Customer Service Phone 910-796-7215 NCDEQ Wilmington Regional Office 127 Cardinal Drive Ext. Wilmington, NC 28405 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. I Application Completeness Review Checklist Project Name: D%�,, Se- (; Sf uo,C, Date Delivered to WIRO: A9r Zer Zti/ RIMS Received/Accepted Date: Z Ic Project County/Location: *BIMS Acknowledged Date: Rule(s): 02017 Coastal E 2008 Coastal 1:11995 Coastal ®Phase II ®Universal 01988 Coastal Permit Action: New / ajar M Minor Mod / Renewal / Transfer **New Permit #: Permit Type HD / LD / LD Overall / HD &LD Combo xisting Permit #:5ccdg 0 General Per / Offsite / Exempt / Rescission F�PE Cert on File? SCM Type(s): Offsite to SWB: Development Type: Commerc' Residential / Other Subdivided?: Subdivision or Single Lot ❑Master PE Cert on File? For New or Transferred Permits Permittee is: Stream Class: Property Owner(s) DDeveloper Lessee ❑Purchaser ®HOA ®SA Map ®ORW Map Paperwork Emailed Engineer on: 1:15upplement(s) (1 original per BMP) ffo&M with correct/original signatures (1 original per BMP except LS/VFS and swoles) implication with correct/original signatures Email Address: Design Engineer Corp or LLC: Sig. Auth. per SoS or Signature Authorization letter or report Email Address: Property Owner $505 (within 6mo) Checkrx(s): /!? / 1 F-1No Fee Deed Soils Report, w/SHWT or General Report MEmail Address: Lessee Calculations (signed/sealed) Lease Agreement Deed Restrictions, if subdivided: ❑Email Address: Purchaser El**Signed & Notarized Template El Purchase Agreement Correct Template (Comm/Res & HD/LD) or Dec. Covenants &_Rest. T 1-1 Email Address: Developer Recorded Covenants ElEmail Address: HOA Representative Recorded Plats ❑50% or more Lots Sold List ED-P"roject Narrative ®USGS Map Plans Ef2 Sets Wetlands: Delineated or No Wetlands ricinity Map Project Boundaries Legend Layout (proposed BUA dimensions) OVA Maps E36etails (roads, cul-de-sacs, curbs, sidewalks, BMPs, Buildings, etc) Existing Conditions Landscape Plan ®Grading [aE Seal REVIEWER NAME: NOTES TO REVIEWER: *Enter BIMS Acknowledged Date on this Sheet **FOR NEW Projects -Enter New Permit # on Supplements & Deed Restiction Templates. C? GMQ\�\Reference LibraryProcedures\Checklists\Completeness Review Checklist_2078 03 13 PA RAMOUNT APR Bea E N G I N E E F=i 1 N G. 1 N G. April 29, 2019 Ms. Georgette Scott NCDEQ — DEMLR — Stormwater 127 Cardinal Drive Extension Wilmington, NC 28405 RE: NOV 2019-PC-0224 SW8 160910 — Enterprise Drive Self Storage Leland, Brunswick County Dear Ms. Scott: On behalf of William Schoettelkotte and WCM Enterprises, LLC, we are responding to the above referenced Notice of Violation for Stormwater Permit SW8 160910 issued October 21, 2016. There is a new landowner, LIP Mini Storage, LLC, therefore we have sent in the Application for Transfer after the violations are resolved as part of this Modification. We have provided the revised project plans and calculations. The pond changes were a result of NCDOT not allowing discharge to US 74-76; therefore, the only outlet to the proposed pond was back towards the rear of the site along a side ditch. Both ponds discharge into the side ditch which travels to Trade Street's drainage and the overall Industrial Park. Pond A should not short circuit based on the 1.5" rainfall -runoff staging of the temporary pool with a pipe flow entering the forebay deeper than the forebay top and raising the pond level till it reaches the secondary overflow. Please find attached stormwater modification and permit transfer along with Asbuilt Drawings of the Ponds and Grading Plan, and updated Site Plan and Drainage Area Map. Sincerely, J. Branch Smith, PE Cc: WCM Enterprises, LLC LIP Mini Storage, LLC Encl: AB-1 Pond Plans AB-2 Pond Details C-2.0 Approved Site Plan DA-Map Updated O&M EZ Forms Asbuilt Stormwater Narrative SWU-101 Application Mod. SW Transfer Application with $505 Fee 1 2 2 C I N E M A ❑ R I V E, W 1 L M I N s T ❑ N, N C 2 9 4 ❑ 3 P H: ( 9 1 ❑ ) 7 9 1 - 6 7 0 7 F A X: (9 1 ❑ 1 7 9 l - 6 7 6 ❑ ti :I i ROY COOPER Governor MICHAEL S. REGAN Secretary S. DANIEL SMITH Interim Director NORTH CAROLINA Environmental Quality March 29, 2019 CERTIFIFD AlAlf. ##7011 2000 0002 2768 9537 12L'1'UItN Iu:CFII'T RFQUES'NFD WCM Enterprises, LLC Attn: William "I. Schoettelkorie, Nlanage.r ,05 Colonial Dr. Wilmington, NC 28403 Subject: NOTICE OF VIOLATION NOV 2019-SIT-0224 Enterprise Drive Self Storage Storinwater Permit No. SW8 160910 Brunswick County Dear Mr. ,Schoettelkotte: On March 13, 2019, Wilmington Regional Office staff of the Division of Energy, Mineral and Land ]tesources (DI -',MLR) preforined a compliance inspection of the subject project located at the Intersection of Enterprise Drive and Trade Street in Leland, Brunswick County. The compliance inspection was conducted to determine the status of compliance with Stormwater Management Permit Number SW8 160910 issued on October 21.2016. The project has been found in violation of Siormwater Permit Number SW8 160910, issued pursuant to the requirements of the stormwater rules; 15A NCAC 021+1000. The violations found arc: .failure to construct accorcling the approved plans. Per Section IL7 of the permit, the facililies shall be constructed in accordance with tote conditions of this permit, the approved plans and sped fkat ions, and other supporting data. The following deviations from the approved plan were noted during the site inspection; a. Additional barking was constructed to the north of Building 13 that was not shown on the approved plans. b. The area identified for future development on the approved plans to the west of Building A is being used for outdoor storage. c. The collection system inlets were. not installed as shown on the approve(] plans. The locations and number- of drop inlets has changed from the approved plans. d. The location of the outlet structures and outfalls constructed For both Pond A and Pond 11 have changed from the approved plans. The new outlet location for Pond A was constructed adjacent to thc; approved forebay berm and inlets, which would allow the water to shorl-circuit the pond. The emergency rip -rap spillway is not installed per the approved stormwater plan. a. fond A was constructed larger than shown on the approved plans. 2. Failure to submit than res to the Division or approval. Per Section EI.1 of the permit; no person or entity, including the periluttcc, shall alter any component of the approved storinwater system shown on the approved plans unless and until the Division has approved of the revised plan. Additionally; per Section I1.10 of the permit, the pennittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to constrltction, for any modification to the approved plans. Failure to operate and inaintain the storn2water system. Per Section 11.4 of the permit, the permittee shall provide the operation and maintcnance, necessary to assure the permitted storrttwater system functions at the design condition. Al. the time of the inspection, fond A was found to be full, but the orifice was not discharging. lr' ` North Carolina Department of Environmental Quality I Division of Energy. Mineral and land Resources Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405 noon. CAAO 910,796.7215 State. Stcrmwatcr Permit No. SW9 160910 Page 2 of 2 4. Failure to provide an accurate eertirIcatio?. Per Section 111.8 of the permit, upon cornplet ion of construction, the perrnittec shall cause a certification from an appropriate designer for the system installed to be submitted, certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting documcni.a.t.ion. Any deviations from the approved plans and specifications must be noted on the Certification. The. certification received on Junc 1, 2018 documented that the site has been built according to the approved plans with the only deviation being ]tern 8 that indicates that the pond plantings are scheduled to be planted the following spring/summcr. However, as documented in 1.11i9 notice, the site inspection revealed significant deviations frorn.the approved plans. 5. Failure to iransfir the permit. Per Section 111.4 of the permit; this permit is not transferable. to any person or entity except after notice to and approval by the Director A review of the 131-1,41lswiek County GIS revealed that the property covered under this permit has been transferred to UP Mini Storage, L1,C. `1'o correct these violations you must: I . Maintain the outlets for the ponds to ensure that the pond orifices are not clogged and that the pond drains tc the intended permanent pool elevation Buell thaL the required storage volt.trrlc is provided. 2. C0115Lr'uet the site in accordance with the'approml plans or subrrtit a modification that addresses the changes to the, built -upon area, collection systern, and pond designs. The revised site plans must demonstrate that the water does not short-circuit. Pond A. 3. Submit a new certification once a modification to the permit is approved by the Division, 4. Submit all application to transfer the permit to llte current. property owners. The transfer application will either need to be submitted afier these compliance items are resolved OR itcan be subrniticd at any time as long as the new property owners agree to resolve these compliance items (see the check box with italic teat in Section P of the transfer Form). Please provide a "Plan of Action" by April 28, 2019 to this office that states how and when these violations will be corrected. 1f we do not receive your plan of action by this date you will be in violation of 15A NCAC 21-1.1000, which could result in the initiation of enforcement. action ,�,hlch rnay include recommendations for the assessment of civil penalties, up to $25,000 per day; pursuant to NCGS 143- 215.6A. If you have arty questions, please contact Christine Hall in the Wilmingion Regional Office at (910) 796- 7215 or christ.ine.hall a ncdenr.gov. Since ely, ,Danny S n h, interim Director Division of Energy, Mineral and Land Resources Enclosure: Compliance Inspection Report Attachment A — Pictures, Aerials Images, and Scanned Sections of the Approved Plans GDSlcanh: %StorrttwaterlPermits k, Projects1201611609f0 1-1D12019 03 NOV 160910 cc: Branch Smith, PE; Paramounte Engineering UP Mini Storage; i.,LC; Attn: William Schoettelkotte, Member; 29 1-lydrangca Place, Wilmington, NC 28403 Bruns-,�,ick County Engineering Wilmington Regional Office. Storrnwater Pile r f rj Compliance Inspection Report Permit: SVY816091C Effective: 10/21/16 Expiration: 10/21124 Project Enterprise Drive Self Storage Owner: Wcm Enlerprises LLC County: Brunswick Adress: Enterprise Dr Region: Wilminglon City/State/Zip: Leland %C 28451 Contact Person: William C SChochelkolle Title: Manaoer Phone: Directions to Project: Travel US74176 past Leland riaht on Enterprise Drive at Windsor Commercial Park site on vacant property on left corner of Enterprise. Type of Project: State Stormwaler - HD - Detention Pond Drain Areas: A - (♦janlon Branch) (03-06-17) ( C,Sw) B - (Banton Branch) (03-06-17) ( C;Sw) On -Site Representative(s): Related Permits: Inspection Date: 0311312C19 Entry Time: 02:C5PIvi Primary inspector: Creighton A Brown Secondary Inspector(s): Christine A Hall Reason for Inspection; Routine Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant 90 Not Compliant Question Areas: State Stormwater (See attachment summary) Exit Time: 02:25PM Phone: 910-796-7215 Inspection Type: Compliance Evaluation page: 1 ,r Permil: SWRI S0910 Owner - Project: Wcm Enterprises _I_C Inspection Date: 0311312019 Inspection Typo Compliance Evaluation Reason for Visit: Rowine Inspection Summary: In order to resolve the identified compliance issues: 1. Maintain the outlets for the ponds to ensure that the pond orifices are not clogged and that the pond drains to the . intended permanent pool elevation such that the required storage volume is provided 2. A modification must be submitted to address the changes to the built -upon area, collection system, and pond designs, The revised site plans must demonstrate that the water does not short-circuit Pond A. 3. Once a modification to the permit is approved by the Division, a new certification must be submitted. 4. An application to transfer the permit to the current property owners must be submitted. The transfer application will either need to be submitted after these compliance items are resolved OR it can be submitted at any time as long as the nevr property owners agree to resolve these compliance items (see the check box with italic text in Sectlon F of the transfer form). pace: 2 Permit: SW816091 D Owner - Project: Wcm Enterprises LLC Inspection pate: 03/1312019 Inspection Type Compliance Evaluation Reason for Visit: Routine File Review Yes No NA NE Is the permit active? 0 ❑ ❑ ❑ Signed copy of the Engineer's certification is in the file? Signed copy of the Operation & Maintenance Agreement is in the file? Copy of the recorded deed restrictions is in the file? El ❑ ❑ ❑ Comment: The certification received on June 1. 2018.documented that the site has been built according to the approved plans with the only deviation being Item 8 that indicates that the pond plantings are scheduled`_ to be planted the following spring/summer. However. the site inspection revealed significant deviations from these approved plans. Built Upon Area Yes No NA NE Is the site 8UA constructed as per the permit and approval plans? ❑ ❑ ❑ ❑ Is the drainage area as per the permit and approved plans? ❑ ❑ ❑ Q Is the BUA (as permitted) graded such that the runoff drains to the system? ❑ ❑ 1119 Comment: Additional parking was constructed to the north of Building E that was not shown on the approved plans. The area identified for future development on the approved plans to the west of Building A is being used for outdoor storage SW Measures Are the SW measures constructed as per the approved plans? Are the inlets located per the approved plans? Are the outlet structures located per the approved plans? Yes No NA NE ❑ a ❑ ❑ MEADOWi Comment: Pond A was constructed larger than shown on the approved plans. The collection system inlets were not installed as shown on the approved plans. The locations and number of drop inlets has changed from the approved plans. The iocation of the outlet structures and oAfalis constructed for both_ Pond A and Pond 8 have changed from the approved plans. The new outlet location for Pond A was constructed adiacent to the approved forebay berm and inlets, which would altow the water to short-circuit the pond. The emergency rip -rap spillway is not installed per the approved stormwater plan. Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ❑ ❑ ❑ Are the SW BMP inspection and maintenance records complete and available for review or provided to ❑ ❑ ❑ DWQ upon request? Comment: At the time of the inspection. Pond A was full _but _not discharging. Other Permit Conditions yes No NA NE Is the site compliant with other conditions of the permit? ❑ Q ❑ ❑ Comment: A review of the Brunswick County GIS revealed that the property covered under this permit has been transferred to LIP Mini Storage LLC. State Stormwater permits are not transferable except after notice to and approval by the Qivision, page: 3 Attachment A — Pictures, Aerials Images, and Scanned Sections of the Approved Plans SW8 160910 Enterprise Drive Self Storage Photos from the March 13, 2019 site inspection and scanned sections of the plans approved on October 21, 2016 Built -Upon Area First part of entrance road off Enterprise Drive Remainder of the entrance road. Approved plans show a third inlet that has not been installed. Page 1 of 8 Additional parking areas were constructed along Building E that were not shown on the approved plans. Aerial imagery (dated 9/19/18) of Building E and constructed parking to the north that was not shown on the plans. Page 2 of 8 Aerial imagery (dated 9/19/18) showing the open space around Building B (east building) is being used for outdoor storage. The inspector reported the area of future development west of these buildings is also being Page 3 of 8 Stormwater Control Measures — Pond A and Pond B East side of Pond A — The approved plans show the outlet is supposed to be on this side of the pond. West side of Pond A —The outlet structure has been constructed adjacent to the fore bay berm wall and inlets allowing the water to short-circuit the pond. Page 4 of 8 4N. 10, P, -wt A Aerial imagery of Pond A (dated 9/19/18) showing the constructed location of the outlet structure and lack of a approved plans. Approved plans for Pond A ++ w orr "112 9 s as .vast __ ' . L asipOw �.6ebi QAW i� POND A VEGETATED SHELF a LL OND A� (SEE WC MLO) `�6 POND A OUTLET STRUCTURE "- — IEEE DETA". ±. u SA. I SIMP POND A OUTFALL — t F PONID A )RESAY EfAILS) 15WP POND S OUTFACE — — 77- FNV OU7■51,0 rM 1Y Page 6 of 8 Approved plans for Pond B ation of the outlet structure. x 4 N I BRUN PONDS Comm VEGETATED SHW PH* Q (SEE DETAILS) DE i!11 1 1 POND 8 OUTLET STRUCTURE (SEE DETAILS) iYRGP POND 8 OUTPALL Page 8 of 8 L Pond B from the forebay looking east -- The approved plans show the outlet is supposed to be in the right hand corner of the far side of the Pond. y East side of Pond B—The outlet structure has been constructed in the middle of the pond berm. Page 7 of 8 North Carolina Secretary of State Search Rcsults Page l of I • File an Annual Report/Amend an Annual Report • Upload a PDF Filing • Order a Document Online - Add Entity to My Email Notification List • View Filings • Print a Pre -Populated Annual Report form • Print an Amended a Annual Report form Limited Liability Company Legal Name LIP Mini Storage, LLC Information Sosld: 1596363 Status: Current -Active Annual Report Status: Current Citizenship: Domestic Date Formed: 5/19/2017 Registered Agent: Schoettelkotte, William Addresses Mailing 223 Greenville Ave Wilmington, NC 28403 Reg Mailing 223 Greenville Ave Wilmington, NC 28403 Company Officials Principal Office 223 Greenville Ave Wilmington, NC 28403 Reg Office 223 Greenville Ave Wilmington, NC 28403 All LLCs are managed by their managers pursuant to N.C.G.S. 57D-3-20. Member Member Member RHJR Properties, LLC William W Schoettelkotte WCM Enterprises, LLC 223 Greenville Ave 29 Hydrangea Place 305 Colonial Drive Wilmington NC 28403-3511 Wilmington NC 28403 Wilmington NC 28403 Mips:ll«,\N,\N,.sosne.gov/online_services/searchl]3usiness_Registration_]tesults 3/28/2019 �1 June 1, 2018 To: NCDEQ -- DEMLR — State Stormwater 127 Cardinal Drive Extensions Wilmington, NC 28412 JUN 0 1 2013 Cc: Brunswick County Engineering Dept (Brigit Flora, PE) Re: STORMWATER MANAGEMENT PERMIT Permittee: WCM Enterprises, LLC Property Owner: WCM Enterprises, LLC Permit #: SW8 160910 dated 10/21/2016 County Permit #: Address: 2011 Enterprise Dr. NE, Leland, NC 28451 Development/Project: Enterprise Drive Self Storage "Coastal Mini Storage CMS Leland" 1, James Branch Smith, as a duly registered Professional En ig ncer in the State of North Carolina, having been authorized to observe periodically the construction of the above referenced project for the Permittee, hereby state that to the best of my abilities due care and diligence was used in the observation of the project construction such that the construction was observed to be built and reconstructed if necessary, within substantial compliance and intent of the State and County approved plans and specifications. Certification Requirements under Rule 15A NCAC 2H.1000 and Session Law 2008-21 1 (prior to current rules) conditions as dated above. Future inspections will determine the completeness ofthe items listed below: _X_ 1. The drainage area to the system contains approximately the acreage. _X_ 2. The drainage area to the system contains no more than the permitted amount of the built -upon area. _X-3. All the built -upon area associated with the project is graded such that the runoff drains to the system. _X_ 4. All roof drains are located such that the runoff is directed into the system. _X 5. The outlet/bypass structure elevations are per the State approved plans and revised County plans issued May 3, 2018 to County Engineering. _X_ 6. The outlet structure is located per the approved plans. _X_ 7. Trash rack is provided on the outlet/bypass structure. _Note_8. All slopes are grassed with permanent vegetation. The pond plantings are scheduled to be planted this spring/summer. _X_ 9. Vegetated slopes are no steeper than 3:1. _X_ 10. The inlets are located per the approved plans and do not cause short-circuiting of the system. _X_ 11. The permitted amounts of surface area and/or volume have been provided. _X_ 12. Required drawdown devices are correctly sized per the approved plans. _X_13. All required design depths are provided. _X-14, All required parts of the system are provided, such as a vegetated shelf, a forebay, and the vegetated filter. Page 1 of 2 _X_ 15. The required dimensions of the system are provided per the approved plan. _X_ 16. All components of the stormwater BMP are located in either recorded common areas or casements. Name: J Branch Smith NC PC#: 034354 Si nature: Date: CA 5'Si' = 6F D�y SEAL {: _ — 034354 — �?� G1. ~ �9 •FN !N BR \ AN��S1�`�' Seal Page 2 of 2